Apparatus for treating tin-scrap.



N0. 891,486. A PATENTBD JUNE 23, 1908.

. M. LEITGH.

APPARATUS FOR TREATING TIN SCRAP. APPLICATION FILED MAR. 2B, 1908.

WWW:

UNITED, STATES PATENT OFFICE.

MEREDITH LEITCH OF SPRINGFIELD MASSACHUSETTS, ASSIGNOR TO METAL PROCESS COMPANY, OF NEW YORK, N. Y.,- A CORPORATION .OF NEW YORK.

APPARATUS FOR TREATING TIN-SCRAP.

Specification of Letters Patent.

Patented June23, 1908.

Application filed March 26, 1908. Serial No. 423,375.

To all whom it may concern:

Be it known that 'I, MEREDITH LEITCH, a citizen of the United States, residing at Springfield, Hampden county, State of Massachusetts, have invented certain-new and useful Improvements in Apparatus for Treating-Tin-Scrap, of which the following is a full, clear, and exact description.

My invention relates to improvements in apparatusfor treating tin scrap and the like,

' particularly tin scrap in the form of old tin I Fig. 1, looking toward the left.

Referring more particularly to the drawings, A A and A 'represents three cylinders constituting .portions of a removable composite cylinder sup ort d by wheels B 'B mounted on shafts C, one of which shafts is driven by any suitable mechanism such as bevel gears D-E. The composite cylinder composed of the parts A A and A reclines an d its axis may be horizontal and preferably is approximately horizontal, as shown. The section A has an opening F through which the tins cans and the like are shoveled into that section. This section is provided with pinsG projecting inwardly, which, as the apparatus revolves, lifts the cans so that they are raised and allowed to fall from a height,

thus subjecting them to mechanical shocks. These pins are preferably ,separated fromeach other longitudinally by about six inches, and there are as many series of them as may be found desirable, the series being reduced in number in the drawing for the purpose of simplicity. The portion A is also provided with perforations H, so that it constitutes a screen for the purpose of screening out dirt and small particles which may be dislodged by the tumbling process.

The cylinder A is constructedsubstan tiall y like the cylinder A, with tho exception that it is longer in length and slightly ta pered and has no perforations and therefore 'does not. constitute a screen, and is sur ductorof heati The portion A is also constructed similar to the portion A having what shorter in length. Between t e portions'A and A is a partition J, having a comparatively small or constricted openin K in front of which is a hopper L, one si e'Z of which is extended to the periphery of the cylindrical portion A, the wall and hopper constitutin a scoop. The ap aratus revolves in the direction indicated by the arrow in tion Z lifts up the cans. and causes them to flow down into the hopper L and through the opening K into the section A The section A is surrounded by a drum M, which has a small opening N. This drum collects the small particles of solder, together with any dirt which may have progressed thus far, which dirt and solder is gradually sifted out through the hole N as the cylinder revolves. Between the sections A and A is a circular cans somewhatso as to, retain them in the section A for a. longerperiod than they would be retained if such wall were not present.

At'the right hand end of the section A is a chamber formed by a cylindrical wall A hav: ing openings PP, as indicated in Fig. 8. These openings are alternately opened and closed-by valves QQ, an opening P being closed when it is at the top of the cylinder and open when it is at the bottom. They open into passages RR, which are separated from each other by partitions SS The passages RR have openings T--T, which permit the cans to drop out when those 0 enings are at their lowermost positions. etweeneach opening P and its corresponding opening T is 'a valve U Each valve U closes one of the passages R-whenever the valve Q opening into that assage, is open. The action. of the valves (5 and U therefore results in preventing the free passage of air through the openings T and P, although permitting the discharge of the cans through those openings as the cylinder revolves.

Connected to the outer vertical wall V at .the right'hand end of the apparatus is a tubular burner W. This is preferably attached j to the wall V so as to revolve therewith. At theleft hand end of this burner is secured a rounded by a covering I, which'is anon-con both pins and perforations, .but bein some.-

Fig. 2, with the result that the extended porwall or barrier O, which acts to dam back the distributer l for directing the flames at the mouth of the burner so that they will be thrown toward the periphery of the cylindrical portion A Within the burner is located the discharge nozzle'X of an air and oil supply, of the ordinary type, controlled b suitable cocks, a eing the oil supply an' I) being the gas supply, working on the well known atomizerv principle. The discharge nozzle X of the oil and air system is located within the burner W and does not completely fill the same and thereby permits some air to be drawn in through the burner which does not pass through the air pipe b; it being found that a portion of the supply of 'air can be satisfactorily introduced in this manner, the amount .of oil and air forced in being regulated through valves in ,the pipes (L b. The entire surfaces of the sections A and A are perforated, though for simplicity only a few perforations are shown.

The operation of the apparatus is as follows: The scrap to be treated is fed in through the opening F. The circular Wall f at the mouth of the opening causes the cans to heap up, and as they heap up and the cylinder is revolved, they gradually, on account of the accumulation, roll down toward the right hand end of the section A. The dirt is largely shaken 011' and sifted out through the holes H during this period. When they reach the right hand end of the section A, they are scooped up by the wall 1 and dropped into the hopper L and passed. through the opening K. They are forced to move along through the section A in a man ner similar to that in which they were forced to move along in the section A, and;while in this section are subjected to a heat from the burner W sufficient to melt the solder thereon. regulated by'the valves in the pipes a b, so that it is deoxidized or free from oxygen, and the atmosphere within the chamber A is therefore a deoxidizing atmosphere. The wall J with the comparatively small opening K, assists very much in maintaining a deoxidizing atmosphere within the cylinder A since it prevents air from entering into this section through the opening F and the portion A The opening K as well as the open- N are so small that they are entirely ta en up with products of combustion passing outward through them. While the? cans are in the section A", and the cans, being lifted up and dropped down, their portions are separated. The portions are retained in the section A for a considerable period by the circular wall or barrier 0, over which they must flow in order to enter the section A When the cans reach the section A they are subjected to a still further tumbling action and still more solder is dislodged, and the solder, together with any dirt which may reach the section The flame produced. by the burner TV is the solder is melted charge opening at the other end, of means der adjacent to said wall and A", is sifted through the holes in that section into the outer chamber, and, as the cylinder revolves, discharged through the opening N. The section formed by the cylindrical wall A is of somewhat smaller diameter than the sec tion A, on account of which the cans are de..

layed in their progress from the section A to the section A, thereby insuring a thorough tumbling. When the cans pass from the section A to the section A they drop through one of the openings P in the discharge apparatus, and as the cylinder revolves are discharged through one of the openings T-T,

but before being discharged they have been for some time removed from intense heat, and therefore are cooled down to a non-oxidizing temperature before they are exposed to the air, the result being that they are desoldered and separated without having the tin upon them oxidized, and are in a proper condition for being sub j ected to the action of any suitable detinning process. In the aparatus as actuallynsed, the section A is about 42 inches in diameter and the other parts preferably haveproportions about as shown. The apparatus operates satisfam torily when the cylinder is revolved at the rate of 20 revolutions per minute.

vThe apparatus above described. is the preferred embodiment of my invention. It may, however, be modified in various ways without departing from the spirit thereof.

What I claim is:

1. In an apparatus for treating tin scrap, the combination with a reclining cylinder having a receiving opening at one end and a discharge opening at the other end, of means for creating a heated deoxidized atmosphere within said cylinder, a wall transverse to said cylinder having an opening dischar ing into said cylinder, and a scoo secure( to said cylinder and discharging tlirough'said penmg. Y

2. In an apparatus for'treating tin scrap,

'the combination with a reclining cylinder having a receiving opening at one end and a discharge opening at the other end, of means for creating a heated deoxidized atmosphere within said cylinder, awall transverse to said cylinder at one end having a constricted open.- discharging into said cylinder and means for closing the discharge opening against the free passage oi air or gases.

3. In an apparatus for treating tin scrap, the combination with a reclining cylinder hav a receiving opening at one end and a disfor i-reatin a heated deoxidized atmosphere withinsai cylinder, a wall transverse to said cylinder at one end having an opening dis- '0 arging into said cylinder, a screening cyl na scoopad aoent to said opening and discharging therethrough, and a restraining wall at the other end of said heating apparatus for delaying the in the progre 20 for cr'eatin a heated d c in er at one end and having an discharging into said linder wall at the other end 02 said heatin tus for dela in the progress oft through sai cfiinder, a screening ad'aceiit to said other end of said cy inder, and a discharging the screening cylinder.

trea

, a restraining.

valve-controlled m X through sai cy inder, said restraining wa foratioiis 1' 5 havin perforations along its base. means f 5. ii an apparatus for treating tin scrap,

* the combinat on with a reclining cjlinder ghaving a receiying opening at one en and a tion als discharge opening at the other end, of means and per sphere appara e scrapcylinder heating eans for I ted scrap f1'om said progress of the scrap through said cylinder forations, aheating section adjacent thereto, and means for losing the discharge opening means for producing a heated deoxidized atagainst the free passage of air-or gases. mospnere within said heating section, a third 4. In an apparatus for treating tin scrap, section at the other ehd of said heating sec- 5 the combination with a reclining c linder tion also provided with inward pro ections aving a'receivin'g opening at one en and a and perforations, a transverse partition bedischarge opening at the other end, of Ineans tween said first two sections rovided with for cre'atingla heated deoxidi'zed atmosphere an opening of relativel smal dimensions, Within said cylinder, a wall transverse to said and a valve-controlled ischarge section ad- 10 c linder at dne end having an opening disjacent to said second screening section. c arging into \said cylinder, and a restraining 8 In an apparatus for treating 'tin scra wall at the other end of said heating-apparathe combination of a cylindrical section protus for dela ss of the scra I vided with inward pro ections and with erng section, a third 2 said heating sec- "Ward projections ei'se partition be- \within sai cylinder, a wall transverse to said an opening of relatiyely small dimensions a i; linder at one end having an opening disbarrier between the second and third sections 0 arging into 'said cylinder a restrainin for delaying the progress of the material and Wall at the rear of said heating apparatus for a valve-controlled discharge section adjacent d layin the pro ress of the scrapthiough to said second screenin section.

' said-0y inder, and screening cylinders ad a- -9. In an apparatus or treating tin scrap,

ceint to both ends of said heating cylinder. the combination of a cylindrical section ro- $5. In an apparatus for treating tin scrap, vided with inward pro ections and with erthe combination with a reclining ciylinder forations, aheating section adjacent there to,

ay" g a receiving opening at one en and a means for producing a heated deoxidized atdischarge opening at the other end, of means mos here within said heating section, a third for'creatin a heated deoxidizedatmosphere section at the other end of said heating secwithih said cylinder, a wall transverse to 'said tion also provided with inward pro ections opening an perforations, a transverse partition be- MEREDITH LEITCH.

In an apparatus for treating tin scrap, I Witnesses: g the combination of a cylindrical section pro- A. MORFQRD, vided with inward PIOJBCtlOHS and with ,per: C. L. RoEsc i.

i It is hereby certified that in Letters Patent N 0. 891,486, granted June 23, 1908, upon I g the application of Meredith Leitch, of Springfield, Massachusetts, for an improvement in Apparatus for Treating Tin-Scrap, an error appears in the printed specification E requiring correction, as follows In line 2,- page 3, the word losing should read 2 closing; and that the said Letters Patent should be read with this OQI'IBCtlOD therein I ha-tfthe sa'iiie inay conform to the record of the case fiTtheBa entQflicen Signed and sealed this 14th day of July, A. D., 1908. v .E [sEAL] Q l 1 E. Commissioner of Patents. ii

in the progre 20 for cr'eatin a heated d \within sai cylinder, a w b linder at one end hav arging into I Wall at the rear of sai c in er at one end and having an discharging into said 0 linder wall at the other end 02 said heatin tus for dela in the progress oft through sai cfiinder, a screening ad'aceiit to said other end of said cy inder, and a discharging the screening cylinder.

trea

eoxidize'd atmo all transverse a restraining.

valve-controlled m X through sai cy inder, said restraining wa forations 1' 5 havin perforations along its base. means f 5. ii an apparatus for treating tin scrap,

* the combinat on with a reclining cjlinder ghaving a receiying opening at one en and a tion als discharge opening at the other end, of means and per sphere to said appara opening e scrapvalvecylinder heating cans for I ted scrap from said progress of the scrap through said cylinder forations, aheating section adjacent thereto, and means for losing the discharge opening means for producing a heated deoxidized atagainst the free passage of air-or gases. mospnere within said heating section, a third 4. In an apparatus for treating tin scrap, section at the other end of said heating sec- 5 the combination with a reclining c lindei tion also provided with inward pro ections aving a'receivin'g opening at one en and a and perforations, a transverse partition bedischarge vopening at the other end, of means tween said first two sections rovided with for cre'atingla heated deoxidized atmosphere an opening of relativel smal dimensions, Within said cylinder, a wall transverse to said and a valve-controlled ischarge section ad- 10 c linder at dne end having an opening disjacent to said second screening section. c arging into said cylinder, and a restraining 8 In an apparatus for treating tin scra wall at the other end of said heating-apparathe combination of a cylindrical section protus for dela ss of the scra i vided with inward pro ections and with erng section, a third 2 said heating sec- "Ward projections ei'se partition bearge section ad j acent section.

d layin the pro ress of the scrapthrough said-cy inder, and screening cylinders ad a- -9. In an apparatus or treating tin scrap, ceiut to both ends of said heating cylinder. the combination of a cylindrical section ro- 6. In an apparatus for treating tin scrap, vided with inward pro ections and with erthe combination with a reclining (ylinder forations, aheating section adjacent there t'o, ay" g a receiving opening at one en and a means for producuig a heated deoxidized atdischarge opening at the other end, of means mos here within said heating section, a third for'creatin a heated deoxidizedatinosphere section at the other end of said heating secwithih said cylinder, a wall transverse to 'said tion also provided with inward pro ections opening an perforations, a transverse partition be- MEREDITH LEITCH.

In an apparatus for treating tin scrap, I Witnesses: g the combination of a cylindrical section pro- A. MORFQRD, vided with inward PIOJBCtlOHS and with ,per: C. L. Ronso r.

i It is hereby certified that in Letters Patent N 0. 891,486, granted June 23, 1908, upon I g the application of Meredith Leitch, of Springfield, Massachusetts, for an improvement in Apparatus for Treating Tin-Scrap, an error appears in the printed specification E requiring correction, as follows In line 2,- page 3, the word losing should read 2 closing; and that the said Letters Patent should be read with this OQI'IBCtlOD therein ii tsetse same aiii lifiidriifi' the Ebr'd 6f the case iTthe BfiehtQflicm Signed and sealed this 14th day of July, A. D., 1908. v .E [sEAL] Q l 1 E. Commissioner of Patents. L

theapplication of Meredith Leitch, of Springfield, Massachusetts, for an improvement in Apparatus for Treating Tin-Scrap, an error appears in the printed specification requiring cgrrection, as followsl: In line 2, page 3, the word losing should read gloaing; and that the said Letters Patent should be read with thie correction therein lthat'tbe same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 14th day of July, A. D., 1908.

E. MOORE,

Commissioner of Patents.

[3 EAL] It is hereby certified that in Letters Patent No. 891,486, granted June 23, 1908, upon 4 

